EP1639122B1 - Systeme d'essai ameliore permettant de determiner la presence d'un antibiotique dans un liquide - Google Patents

Systeme d'essai ameliore permettant de determiner la presence d'un antibiotique dans un liquide Download PDF

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Publication number
EP1639122B1
EP1639122B1 EP04740628A EP04740628A EP1639122B1 EP 1639122 B1 EP1639122 B1 EP 1639122B1 EP 04740628 A EP04740628 A EP 04740628A EP 04740628 A EP04740628 A EP 04740628A EP 1639122 B1 EP1639122 B1 EP 1639122B1
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EP
European Patent Office
Prior art keywords
antibiotic
microorganism
indicator
fluid
test
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EP04740628A
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German (de)
English (en)
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EP1639122A1 (fr
Inventor
Angelina Dekker
Cornelis Jacobus Bouwknecht
Van Johannes Theodorus Arie Pelt
De Angelique Rijk
Jacobus Stark
Pieter Cornelis Langeveld
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DSM IP Assets BV
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DSM IP Assets BV
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Priority to PL04740628T priority patent/PL1639122T3/pl
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
    • C12Q1/18—Testing for antimicrobial activity of a material

Definitions

  • the present invention relates to an improved novel microbiological test system and a new method for the rapid determination of the presence of antibacterial compounds in fluids such as milk, meat juice, serum and urine using said test system.
  • Microbiological test methods for the determination of antibacterial compounds, particularly residues of antibiotics such as cephalosporin, penicillin, tetracycline and derivatives thereof and chemotherapeutics such as sulfa's, in fluids such as milk, meat juice, serum and urine have been known for a long time. Examples of such tests have been described in CA 2056581 , DE 3613794 , EP 0005891 , EP 0285792 , EP 0611001 , GB A 1467439 and US 4,946,777 . These descriptions all deal with ready to use tests that make use of a microorganism and will give a result by the change indicated by an indicator molecule added to the test system.
  • the principle is that when an antibacterial compound is present in the fluid in a concentration sufficient to inhibit the growth of the microorganism the color of the indicator will stay the same, while, when no inhibition occurs, the growth of the microorganism is accompanied by the formation of acid or reduced metabolites or other phenomena that will induce an indicator signal.
  • test systems mentioned above include a test medium, such as an agar medium, inoculated with a microorganism, preferably a strain of Bacillus, Escherichia coli or Streptococcus , and a pH indicator and/or a redox indicator.
  • a test medium such as an agar medium, inoculated with a microorganism, preferably a strain of Bacillus, Escherichia coli or Streptococcus , and a pH indicator and/or a redox indicator.
  • the microorganism and the indicator are introduced into an optionally buffered agar solution, optionally nutrients are added to the solution and optionally substances to change the sensitivity to certain antimicrobial compounds are added to the solution.
  • the agar solution is allowed to solidify to form the test medium such that the microorganisms stay alive but cannot multiply because of lack of nutrients and/or low temperature.
  • a suitable test should have the desired sensitivity with regard to the compounds to be tested for.
  • test systems currently distributed on the market and/or described in literature are that they have a limited sensitivity towards certain antibiotics.
  • One of the consequences of this problem is that for certain applications, for instance when threshold requirements are changed, an adequate test system cannot be made available with the current technology. There is thus a need for an improved test method that does not have this problem.
  • an advantage in sensitivity towards antibiotics such as for instance ⁇ -lactams and aminoglycosides can be achieved.
  • increases in sensitivity can be achieved. Said increases can amount up to 25% and even up to 100% depending on the antibiotic in question.
  • the use of said indicator also results in a test system showing an improved visual contrast when comparing positive and negative samples. This latter phenomenon greatly facilitates accurate visual evaluation of test results.
  • the present invention provides a test system for the determination of the presence of an antibiotic in a fluid which comprises a test medium comprising a microorganism, a substance that provides a solid state and an indicator suitable for the detection of penicillin G, characterized in that said indicator is Bromothymol Blue.
  • kits suitable for the determination of an antibiotic in a fluid comprising a container partially filled with a test medium comprising a microorganism, a gelling agent and an indicator, characterized in that said indicator is Bromothymol Blue.
  • 'CFU' is an abbreviation of Colony Forming Units and refers to the number of microorganisms, spores of microorganisms, partially germinated spores of microorganisms or vegetative cells capable of producing colonies of microorganisms.
  • 'fluid' refers to a substance (as a liquid) tending to flow or conform to the outline of its container.
  • gelling agent' refers to a compound that assists in changing a mixture into or taking on the form of a gel.
  • the term 'indicator' refers to a substance used to measure (for example by change of color or fluorescence) the condition of a test medium with respect to the presence of a particular material (for example an acid, a base, oxidizing or reducing agents).
  • a particular material for example an acid, a base, oxidizing or reducing agents.
  • the term 'indicator' may refer to one or more compounds that are known as pH-indicators, but also to one or more compounds that are known as redox-indicators.
  • the term 'indicator' may refer to mixtures of two or more different types of indicators, such as a combination of a pH- and a redox-indicator. In general, when two or more indicators are used, these indicators are co-operating to increase the indicator effect of each of the indicators when taken alone.
  • 'nutrient' refers to one or more nutritive substances or ingredients that promote and/or are required for the growth of microorganisms as used in the method of the present invention.
  • the term 'sampling device' refers to a device with the aid of which a sample of a fluid can be added to a test medium.
  • a device may be a container, optionally with volume markings.
  • a container may be a capillary, a syringe, a pipette or an automated pipetting system.
  • a syringe or pipette may be designed in such a way that with only one mode of operation a predetermined volume can be withdrawn from the fluid to be analyzed.
  • 'sensitivity' refers to the degree of receptiveness of a given system to sense a certain state. More particularly, in the present case 'sensitivity' refers to the degree by which concentrations of antibiotics in a sample can be determined.
  • 'spore' refers to a primitive usually unicellular often environmentally resistant dormant or reproductive body produced by microorganisms and capable of development into a new individual microorganism.
  • test medium' refers to a composition such as a solution, a solid or, preferably, in the form of a sol or a gel, for instance comprising a gelling agent.
  • gelling agents are agar, alginic acid and salts thereof, carrageenan, gelatin, hydroxypropylguar and derivatives thereof, locust bean gum (Carob gum), processed Vietnameseeuma seaweed and the like.
  • carrier materials such as ceramics, cotton, glass, metal particles, paper, polymers in any shape or form, silicates, sponges, wool and the like.
  • a test medium contains one or more indicators, however, these compounds may also be added later when the test is being performed.
  • the test medium comprises one or more types of microorganisms as detecting agents.
  • the test medium may also contain one or more buffers, nutrients, stabilizers, substances that change the sensitivity to certain antimicrobial compounds in a positive or negative way, and/or viscosity-increasing agents.
  • a buffer When a buffer is present in the medium, it may be added during the mixing of the components of the medium or the components may be dissolved and/or suspended in the buffer.
  • the test medium is sterilized and usually the pH is adjusted to the required value.
  • substances that change the sensitivity to certain antimicrobial compounds are antifolates like ormethoprim, tetroxoprim and trimethoprim that improve the sensitivity of the microorganism towards sulfa compounds or salts of oxalic acid or hydrofluoric acid, which improve the sensitivity towards tetracycline.
  • viscosity-increasing agents examples include ascorbyl methylsilanol pectinate, carbomer, carboxymethyl cellulose, cetearyl alcohol, cetyl alcohol, cetyl esters, cocamide DEA, emulsifying wax, glucose, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, lauramide DEA, linoleamide DEA, magnesium aluminum silicate, maltodextrins, PEG-8 distearate, polyacrylamide, polyvinyl alcohol, PVP/hexadecene copolymer, sodium chloride, sodium sulfate, soyamidopropyl betaine, xanthan gum and the like.
  • the optional ingredients of the test medium mentioned above may also be added exogenously.
  • the test medium may be contained within any type of container; frequently used containers are tubes, microtiter plates and petri dishes.
  • 'threshold' refers to the concentration value above which a given analyte is to be regarded as present and below which said analyte is to be regarded as absent.
  • a threshold value is given for particular analytes in particular samples by local, regional or interregional authorities but it can also be pre-set for certain research purposes.
  • test system that comprises a test medium.
  • the test medium comprises a microorganism, a substance that provides a solid state and one indicator, characterized in that the indicator is Bromothymol Blue.
  • the substance providing for a solid state is a gelling agent and/or a carrier material.
  • the amount of gelling agent in the test medium is between 2 and 100 g.l -1 , preferably between 5 and 50 g.l -1 , more preferably between 10 and 20 g.l -1 , most preferably between 12 and 15 g.l -1 .
  • the gelling agent is agar.
  • the microorganism is a thermo stable microorganism such as a Bacillus species, preferably Bacillus stearothermophilus, an Escherichia coli species, or a Streptococcus species, preferably Streptococcus thermophilus .
  • a Bacillus species preferably Bacillus stearothermophilus
  • Escherichia coli species or a Streptococcus species, preferably Streptococcus thermophilus .
  • Said CFU's may be spores, vegetative cells or a mixture of both.
  • the concentration of said CFU's is expressed as Colony Forming Units per ml of test medium (CFU.ml -1 ) and is usually in the range of 1 x 10 5 to 1 x 10 12 CFU.ml -1 , preferably 1 x 10 6 to 1 x 10 10 CFU.ml -1 , more preferably 2 x 10 6 to 1 x 10 9 CFU.ml -1 , most preferably 5 x 10 6 to 1 x 10 8 CFU.ml -1 , or still more preferably 5 x 10 6 to 2 x 10 7 CFU.ml -1 .
  • a method for the determination of an antibiotic in a fluid comprising the steps of contacting a sample of said fluid with a test medium according to the first aspect of the present invention in the presence of nutrients.
  • the method provides for conditions that there is no growth of microorganism prior to the addition of fluid sample, by keeping the test medium at conditions that prevent growth, such as a relatively low temperature and/or in the absence of nutrients essential for growth.
  • the method of the present invention also includes mixing samples (e.g. with other samples, but also with salts, buffering compounds, nutrients, stabilizers, isotope-labeled compounds, fluorescence-labeled compounds and the like), concentrating and/or diluting (e.g. with diluting liquids such as water, milk or liquids derived from milk, blood or liquids derived from blood, urine and/or solvents) samples prior to addition to the test medium.
  • samples e.g. with other samples, but also with salts, buffering compounds, nutrients, stabilizers, isotope-labeled compounds, fluorescence-labeled compounds and the like
  • concentrating and/or diluting e.g. with diluting liquids such as water, milk or liquids derived from milk, blood or liquids derived from blood, urine and/or solvents
  • the antibiotic is a ⁇ -lactam antibiotic such as a cephalosporin or a penicillin derivative.
  • a ⁇ -lactam antibiotic such as a cephalosporin or a penicillin derivative.
  • examples of such derivatives are amoxicillin, ampicillin, cefadroxil, cefradine, ceftiofur, cephalexin, penicillin G, penicillin V and ticarcillin, but of course many other similar ⁇ -lactam derivatives are known and applicable in the method of the present invention.
  • the antibiotic is an aminoglycoside such as, for instance, neomycin.
  • the method of the present invention displays selectivity with regard to antibiotics, in particular with regard to ⁇ -lactam antibiotics and aminoglycosides.
  • the growth of the microorganism is to take place during a predetermined period, preferably within a time span of 0.5 to 4 hours, more preferably between 1 to 3.5 hours, most preferably between 2.0 to 3.25 hours.
  • the growth of the microorganism is conducted at a predetermined temperature, preferably the optimal growth temperature of the microorganism.
  • said temperature preferably is between 40 and 70°C, more preferably between 50 and 65°C, most preferably between 60 and 64°C.
  • said reaction can be carried out with the aid of a thermostatic device.
  • the time required for growth of the microorganism is equal to the time that is required for a calibration sample without any analyte to induce a change in the indicator.
  • nutrients are added as a separate source, e.g. as a tablet, disc or a paper filter.
  • other compounds such as the indicator(s), microorganism, stabilizers and/or antifolates may be added as a separate source, optionally incorporated in the nutrient medium.
  • a method for determining the presence or absence of an antibiotic in a fluid sample whereby the ratio of the fluid sample to test medium exceeds 2:3 (0.68:1) (v/v).
  • said ratio is at least 20:27 (0.74:1) (v/v), more preferably said ratio is at least 25:27 (0.93:1) (v/v); most preferably said ratio is at least 2:1 (v/v). It has been found that there is no technical reason for an upper limit to the amount of fluid sample. In practice this volume should not exceed the maximum content of the container that holds the test medium. For example, in a 2 ml container having 0.2 ml test medium, no more than 1.8 ml of fluid sample should be added.
  • containers for performing the method of the present invention have a volume that rarely exceeds 50 ml and hence the amount of fluid sample to be added shall not exceed 50 ml, preferably 10 ml, more preferably 5 ml, still more preferably 2 ml, most preferably 1 ml.
  • the upper limit of the ratio of the volume of fluid sample to the volume of test medium is 250:1 (v/v), preferably 50:1 (v/v), more preferably 25:1 (v/v), still more preferably 10:1 (v/v), most preferably 5:1 (v/v).
  • the volume of fluid sample is greater than the volume of test medium.
  • the result of the method of the present invention is determined by the observation of the presence or absence of a change of the indicator or indicators used.
  • a change is a color change
  • said color change may be observed visually.
  • said color change is determined using an arrangement that generates digital image data or an arrangement that generates analog image data and converts said analog image data into digital image data followed by interpretation of said digital image data by a computer processor.
  • Such an arrangement which may for instance be a sample-reading device such as a scanner coupled to a personal computer, is described in International Patent Application WO 03/033728 , incorporated by reference, and briefly summarized below.
  • the arrangement can be suitably used for instance for detecting residues of antibiotics in milk. With this arrangement it is possible to scan the bottom side of each of the samples in a test plate.
  • the color and the brightness of the reflected light are registered in three variables, each describing one color component, for instance the so-called L*a*b* model.
  • L*a*b* model the color spectrum is divided in a two-dimensional matrix. The position of a color in this matrix is registered by means of the two variables "a" and "b”.
  • w L , w a and w b are weighting factors for the L-value, a-value and b-value, respectively.
  • the values of these weighting factors can be calculated by means of "discriminent analysis", such that the group means show a maximum distance in relation to the spreading.
  • kits for carrying out the method of the second aspect of the present invention comprises one or more containers filled with test medium as described in the first aspect of the invention and optionally a sampling device.
  • the containers may be test tubes of any shape and size and from any material available, provided that observation of indicator changes is possible. Also, the containers may be wells such as those incorporated in micro-titer plates.
  • Said sampling device is a device with the aid of which fluid can be added to said test medium.
  • a device is a container, optionally with volume markings.
  • a syringe, a pipette or an automated pipetting system is preferably used in such a fashion that with only one mode of operation a predetermined volume can be withdrawn from the fluid to be analyzed.
  • systems known in the art with which more than one syringe or pipette can be operated with one single handling may be applied. It is the object of the second aspect of the present invention to provide a kit that allows for simple addition of the amounts of fluid to be added according the first aspect of the invention.
  • said kit comprises means for sealing of said containers filled with test medium during incubation and/or an insert with instructions for use and/or a means for setting the time needed for incubation.
  • said kit comprises nutrients.
  • said nutrients are contained within a medium such as a tablet, disc or a paper filter.
  • a medium such as a tablet, disc or a paper filter.
  • the advantages of providing nutrients contained within a medium are that the user can easily add them to the test medium and that the amounts can be predetermined so as to avoid errors in dosing the required amounts.
  • other compounds such as the indicator(s), stabilizers and/or antifolates may be added as a separate source, optionally incorporated in the nutrient medium.
  • said kit comprises a thermostatic device, with the aid of which test samples can be kept at a pre-set temperature, such as the temperature at which the microorganism shows sufficient growth.
  • said thermostatic device is designed in such a fashion that it can hold said containers filled with test medium.
  • the thermostatic device is coupled to a means for setting the time needed for incubation such that heating and/or cooling is stopped after lapse of a pre-set period.
  • said kit comprises a data carrier loaded with a computer program suitable for instructing a computer to analyze digital data obtained from a sample-reading device.
  • Said data carrier may be any carrier suitable for storing digital information such as a CD-ROM, a diskette, a DVD, a memory stick, a magnetic tape or the like.
  • said data carrier loaded with a computer program provides for easy access to the latest available computer programs suitable for use in the method of the present invention.
  • Delvotest ® MCS prepared according to the methods described in EP 0005891 , was adapted by the replacement of the indicator Bromocresol Purple by Bromothymol Blue (160 mg.l -1 ).
  • the sensitivity for different antibiotics was determined by investigating two sets of six experiments using either a plate test or a tube test system. The sensitivity was determined by reading the test at the moment at which an antibiotic-free control changed color. From the results as summarized in the Table below (sensitivity values in ppb), it can be seen that Bromothymol Blue gives superior sensitivities in comparison with Bromocresol purple (BP) for all antibiotics investigated with the exception of sulfadiazine in which case the results for the two indicators are identical.
  • BP Bromocresol purple
  • the first system differs only from a commercially available Delvotest ® MCS in that the concentration of Bromocresol Purple is 160 mg.l -1 , and the second series is as the first with Bromocresol Purple replaced with Bromothymol Blue (160 mg.l -1 ).
  • the sensitivity for penicillin G was determined reading the test at the moment at which an antibiotic-free control changed color. From the results as shown in the Table below (sensitivity values in ppb) it can be seen that the sensitivity of Bromothymol Blue is better than that of Bromocresol Purple at the same concentrations of indicator.
  • Bromocresol Purple (160 mg.l -1 ) Bromothymol Blue (160 mg.l -1 ) Penicillin G 3 2

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Claims (13)

  1. Méthode de mise en évidence de la présence d'un antibiotique dans un fluide comprenant les étapes consistant à :
    (a) mettre en contact un échantillon du fluide avec un milieu d'essai comprenant un microorganisme, au moins une substance qui fournit un état solide et un indicateur,
    (b) incuber le microorganisme pendant une période de temps pour faire pousser le microorganisme au cas où aucun antibiotique n'est présent dans l'échantillon de fluide, et
    (c) détecter la croissance ou l'inhibition de la croissance du microorganisme avec l'indicateur,
    caractérisée en ce que l'indicateur est le bleu de bromothymol.
  2. Méthode selon la revendication 1, caractérisée en ce que l'antibiotique à mettre en évidence est choisi dans le groupe constitué d'un antibiotique β-lactame et un aminoglycoside.
  3. Méthode selon la revendication 1 ou 2, caractérisée en ce que le fluide dans lequel les antibiotiques sont à mettre en évidence est un fluide susceptible d'être obtenu d'un organisme animal ou humain.
  4. Méthode selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le rapport du volume de l'échantillon de fluide sur le volume du milieu d'essai dépasse 0,68:1 (v/v).
  5. Méthode selon la revendication 4, caractérisée en ce que le rapport du volume de l'échantillon de fluide sur le volume du milieu d'essai dépasse 2:1 (v/v).
  6. Méthode selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le volume de l'échantillon de fluide est supérieur au volume du milieu d'essai.
  7. Système d'essai pour la mise en évidence de la présence d'un antibiotique dans un fluide comprenant un milieu d'essai comprenant un microorganisme, au moins une substance qui fournit un état solide et un indicateur, caractérisé en ce que ledit indicateur est le bleu de bromothymol.
  8. Kit adapté à la mise en évidence d'un antibiotique dans un fluide comprenant un récipient partiellement rempli d'un milieu d'essai comprenant un microorganisme, un agent gélifiant et un indicateur, caractérisé en ce que ledit indicateur est le bleu de bromothymol.
  9. Kit selon la revendication 8, comprenant en outre des substances nutritives convenables pour permettre la croissance du microorganisme.
  10. Kit selon la revendication 8 ou 9, comprenant en outre un dispositif thermostatique à l'aide duquel les échantillons à tester peuvent être maintenus à une température prédéterminée.
  11. Kit selon l'une quelconque des revendications 8 à 10, comprenant en outre un support de données chargé d'un programme informatique convenable pour commander à un ordinateur d'analyser des données numériques obtenues à partir d'un dispositif de lecture d'échantillons.
  12. Utilisation du bleu de bromothymol pour améliorer la sensibilité pour un antibiotique dans un test d'inhibition microbienne.
  13. Utilisation selon la revendication 12, caractérisée en ce que l'antibiotique est choisi dans le groupe constitué d'un antibiotique β-lactame et d'un aminoglycoside.
EP04740628A 2003-07-02 2004-07-01 Systeme d'essai ameliore permettant de determiner la presence d'un antibiotique dans un liquide Expired - Lifetime EP1639122B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04740628A EP1639122B1 (fr) 2003-07-02 2004-07-01 Systeme d'essai ameliore permettant de determiner la presence d'un antibiotique dans un liquide
PL04740628T PL1639122T3 (pl) 2003-07-02 2004-07-01 Ulepszony zestaw testowy do oznaczania obecności antybiotyków w płynach

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP03077073 2003-07-02
EP03078707 2003-11-24
PCT/EP2004/007288 WO2005005655A1 (fr) 2003-07-02 2004-07-01 Systeme d'essai ameliore permettant de determiner la presence d'un antibiotique dans un liquide
EP04740628A EP1639122B1 (fr) 2003-07-02 2004-07-01 Systeme d'essai ameliore permettant de determiner la presence d'un antibiotique dans un liquide

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EP1639122A1 EP1639122A1 (fr) 2006-03-29
EP1639122B1 true EP1639122B1 (fr) 2009-02-11

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US (2) US20070092929A1 (fr)
EP (1) EP1639122B1 (fr)
AT (1) ATE422554T1 (fr)
CA (1) CA2528901A1 (fr)
DE (1) DE602004019416D1 (fr)
DK (1) DK1639122T3 (fr)
ES (1) ES2321405T3 (fr)
PL (1) PL1639122T3 (fr)
PT (1) PT1639122E (fr)
WO (1) WO2005005655A1 (fr)

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ATE485389T1 (de) 2004-06-02 2010-11-15 Dsm Ip Assets Bv Testsystem mit hohem ph-wert zur bestimmung des vorhandenseins eines antibiotikums in einer flüssigkeit
EP3578669B1 (fr) 2012-08-08 2024-07-10 F. Hoffmann-La Roche AG Gamme dynamique croissante pour identifier de multiples épitopes dans des cellules
CN108624668B (zh) 2013-02-01 2022-12-02 加利福尼亚大学董事会 用于基因组组装及单体型定相的方法
US9411930B2 (en) 2013-02-01 2016-08-09 The Regents Of The University Of California Methods for genome assembly and haplotype phasing
EP2799881A1 (fr) 2013-05-02 2014-11-05 DSM IP Assets B.V. Procédé de détermination de la présence d'un antibiotique dans un fluide
DK2992108T3 (da) 2013-05-02 2017-11-27 Dsm Ip Assets Bv Fremgangsmåde til bestemmelse af antibiotika i et fluid
WO2016019360A1 (fr) 2014-08-01 2016-02-04 Dovetail Genomics Llc Marquage d'acides nucléiques pour l'assemblage de séquences
EP3259696A1 (fr) 2015-02-17 2017-12-27 Dovetail Genomics LLC Assemblage de séquences d'acide nucléique
US11807896B2 (en) 2015-03-26 2023-11-07 Dovetail Genomics, Llc Physical linkage preservation in DNA storage
KR20180096586A (ko) 2015-10-19 2018-08-29 더브테일 제노믹스 엘엘씨 게놈 어셈블리, 하플로타입 페이징 및 표적 독립적 핵산 검출을 위한 방법
CA3014911A1 (fr) 2016-02-23 2017-08-31 Dovetail Genomics, Llc Production d'ensembles de lecture en phase servant a l'assemblage du genome et la mise en phase d'haplotype
IL262946B2 (en) 2016-05-13 2023-03-01 Dovetail Genomics Llc Retrieving long-range grip information from preserved samples

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EP1639122A1 (fr) 2006-03-29
WO2005005655A1 (fr) 2005-01-20
DE602004019416D1 (de) 2009-03-26
PT1639122E (pt) 2009-04-09
CA2528901A1 (fr) 2005-01-20
ES2321405T3 (es) 2009-06-05
DK1639122T3 (da) 2009-05-04
US20070092929A1 (en) 2007-04-26
US8034580B2 (en) 2011-10-11
PL1639122T3 (pl) 2009-07-31
US20080293093A1 (en) 2008-11-27
ATE422554T1 (de) 2009-02-15

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